books.google.com.au - Geometric Morphometrics for Biologists is an introductory textbook for a course on geometric morphometrics, written for graduate students and upper division undergraduates, covering both theory of shape analysis and methods of multivariate analysis. It is designed for students with minimal math background;...https://books.google.com.au/books/about/Geometric_Morphometrics_for_Biologists.html?id=LKCVAGn8vkoC&q=principal+components&utm_source=gb-gplus-shareGeometric Morphometrics for Biologists